[renderer] Add stubs for Draw_FontString

Draw_FontString is for font-based text rendering. Nothing is implemented
at this stage.

include/QF/GL/qf_draw.h

@@ -56,6 +56,7 @@ void gl_Draw_Picf (float x, float y, struct qpic_s *pic);
 void gl_Draw_SubPic(int x, int y, struct qpic_s *pic,
 					  int srcx, int srcy, int width, int height);
 void gl_Draw_AddFont (struct rfont_s *font);
+void gl_Draw_FontString (int x, int y, const char *str);
 
 void GL_Set2D (void);
 void GL_Set2DScaled (void);

include/QF/GLSL/qf_draw.h

@@ -56,6 +56,7 @@ void glsl_Draw_Picf (float x, float y, struct qpic_s *pic);
 void glsl_Draw_SubPic(int x, int y, struct qpic_s *pic,
 					  int srcx, int srcy, int width, int height);
 void glsl_Draw_AddFont (struct rfont_s *font);
+void glsl_Draw_FontString (int x, int y, const char *str);
 
 void GLSL_Set2D (void);
 void GLSL_Set2DScaled (void);

include/QF/Vulkan/qf_draw.h

@@ -73,6 +73,8 @@ void Vulkan_Draw_SubPic(int x, int y, struct qpic_s *pic,
 						int srcx, int srcy, int width, int height,
 						struct vulkan_ctx_s *ctx);
 void Vulkan_Draw_AddFont (struct rfont_s *font, struct vulkan_ctx_s *ctx);
+void Vulkan_Draw_FontString (int x, int y, const char *str,
+							 struct vulkan_ctx_s *ctx);
 
 void Vulkan_Set2D (struct vulkan_ctx_s *ctx);
 void Vulkan_Set2DScaled (struct vulkan_ctx_s *ctx);

include/QF/draw.h

@@ -246,6 +246,7 @@ void Draw_SubPic(int x, int y, qpic_t *pic, int srcx, int srcy, int width, int h
 
 struct rfont_s;
 void Draw_AddFont (struct rfont_s *font);
+void Draw_FontString (int x, int y, const char *str);
 
 ///@}
 

include/QF/plugin/vid_render.h

@@ -105,6 +105,7 @@ typedef struct vid_render_funcs_s {
 	void (*Draw_Picf) (float x, float y, qpic_t *pic);
 	void (*Draw_SubPic) (int x, int y, qpic_t *pic, int srcx, int srcy, int width, int height);
 	void (*Draw_AddFont) (struct rfont_s *font);
+	void (*Draw_FontString) (int x, int y, const char *str);
 
 
 	struct psystem_s *(*ParticleSystem) (void);

libs/video/renderer/gl/gl_draw.c

@@ -1023,3 +1023,8 @@ void
 gl_Draw_AddFont (struct rfont_s *font)
 {
 }
+
+void
+gl_Draw_FontString (int x, int y, const char *str)
+{
+}

libs/video/renderer/glsl/glsl_draw.c

@@ -846,3 +846,8 @@ void
 glsl_Draw_AddFont (struct rfont_s *font)
 {
 }
+
+void
+glsl_Draw_FontString (int x, int y, const char *str)
+{
+}

libs/video/renderer/r_progs.c

@@ -346,6 +346,15 @@ bi_Font_Load (progs_t *pr, void *_res)
 	r_funcs->Draw_AddFont (font);
 }
 
+static void
+bi_Font_String (progs_t *pr, void *_res)
+{
+	int         x = P_INT (pr, 0);
+	int         y = P_INT (pr, 1);
+	const char *str = P_GSTRING (pr, 2);
+	r_funcs->Draw_FontString (x, y, str);
+}
+
 static const char *
 bi_draw_get_key (const void *p, void *unused)
 {
@@ -397,6 +406,7 @@ static builtin_t builtins[] = {
 	bi(Draw_Crosshair,  5, p(int), p(int), p(int), p(int)),
 
 	bi(Font_Load,       3, p(string), p(int), p(ptr)),
+	bi(Font_String,     3, p(int), p(int), p(string)),
 	{0}
 };
 

libs/video/renderer/sw/draw.c

@@ -979,3 +979,8 @@ void
 Draw_AddFont (struct rfont_s *font)
 {
 }
+
+void
+Draw_FontString (int x, int y, const char *str)
+{
+}

libs/video/renderer/vid_render_gl.c

@@ -508,6 +508,7 @@ vid_render_funcs_t gl_vid_render_funcs = {
 	gl_Draw_Picf,
 	gl_Draw_SubPic,
 	gl_Draw_AddFont,
+	gl_Draw_FontString,
 
 	gl_ParticleSystem,
 	gl_R_Init,

libs/video/renderer/vid_render_glsl.c

@@ -452,6 +452,7 @@ vid_render_funcs_t glsl_vid_render_funcs = {
 	glsl_Draw_Picf,
 	glsl_Draw_SubPic,
 	glsl_Draw_AddFont,
+	glsl_Draw_FontString,
 
 	glsl_ParticleSystem,
 	glsl_R_Init,

libs/video/renderer/vid_render_sw.c

@@ -472,6 +472,7 @@ vid_render_funcs_t sw_vid_render_funcs = {
 	Draw_Picf,
 	Draw_SubPic,
 	Draw_AddFont,
+	Draw_FontString,
 
 	sw_ParticleSystem,
 	sw_R_Init,

libs/video/renderer/vid_render_vulkan.c

@@ -267,6 +267,12 @@ vulkan_Draw_AddFont (struct rfont_s *font)
 	Vulkan_Draw_AddFont (font, vulkan_ctx);
 }
 
+static void
+vulkan_Draw_FontString (int x, int y, const char *str)
+{
+	Vulkan_Draw_FontString (x, y, str, vulkan_ctx);
+}
+
 static void
 vulkan_begin_frame (void)
 {
@@ -756,6 +762,7 @@ vid_render_funcs_t vulkan_vid_render_funcs = {
 	vulkan_Draw_Picf,
 	vulkan_Draw_SubPic,
 	vulkan_Draw_AddFont,
+	vulkan_Draw_FontString,
 
 	vulkan_ParticleSystem,
 	vulkan_R_Init,

libs/video/renderer/vulkan/vulkan_draw.c

@@ -972,3 +972,8 @@ Vulkan_Draw_AddFont (rfont_t *font, vulkan_ctx_t *ctx)
 		dctx->font_tex = Vulkan_LoadTex (ctx, &tex, 0, "draw.font");
 	}
 }
+
+void
+Vulkan_Draw_FontString (int x, int y, const char *str, vulkan_ctx_t *ctx)
+{
+}